Stromberg's Chickens - Big Bird Nests are made larger to accommodate birds that do not fit into conventional nests. Will accommodate large birds such as Jersey Giants, Wyandottes, Brahmas, Orpingtons, Rocks and large Rhode Island Reds. The 1 tier models come in 2, 3, 4 and 5 hole sizes. Current construction: galvanized side panels and perch brackets; plastic top, front & back partitions and perches. Front opening approximately 11 x 10. Sizes 2, 3, & 4 come